Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea8bcc6ccf566ae…

MALICIOUS

PDF

37.3 KB Created: 2020-09-18 08:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33ee21ae596a4052f9ab617767ca2b9 SHA-1: 764627d5d599ff68879441da452fbc7d0b337eff SHA-256: 8ea8bcc6ccf566ae81e078302b7a0edb86eeb8b8704105644e70b2f4b7ea429b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to artificially inflate search engine rankings or to distribute malicious content. One of the embedded URLs, 'https://ttraff.club/wix?keyword=behaviorally+anchored+rating+scale+for+teachers', is identified as a known malicious redirector. The presence of numerous links, including those pointing to potentially malicious infrastructure, strongly suggests a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=behaviorally+anchored+rating+scale+for+teachers
    • http://viler.egyptianreiki.com/uploads/1/3/0/8/130814328/3897200.pdf
    • http://files.acollierastro.com/uploads/1/3/1/6/131607053/rovosiviwuxazum-rowemonedadix-futeja.pdf
    • http://wulugonu.vettoriofficial.com/uploads/1/3/1/6/131606615/godizadi_wumazi_fulumogi_budazekenazeruv.pdf
    • https://cdn.shopify.com/s/files/1/0439/0803/8811/files/ruferalabi.pdf
    • https://cdn.shopify.com/s/files/1/0482/2296/1816/files/lenomajorumatex.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/19936981695.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/the_scarlet_letter_chapter_2_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7138/files/8445109844.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/7691156670.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5819/files/event_schedule_template_doc.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/zetuxexem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000533b.bin
9bbe7a6ba980f791b6422c4fd5cd379f66482c29d1f2007f835e77929e3b78f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x533B 5492 bytes
font_01_sfnt_off000065f7.bin
2f806e71dc05d9586b92c8a1d5b8e3b7c73c645570ac07f27ac20b94070305c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 10120 bytes

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